Don't ignore errors on tests

soft_fail: is used to ignore the tests's failures when the SDK's master
doesn't support Firecracker's latest release version due to breaking
changes.

Since we don't support snapshotting on the SDK yet, the SDK will work
with both v0.22.0 and master.

Signed-off-by: Kazuyoshi Kato <[email protected]>

Author: kzys

.buildkite/pipeline.yml

@@ -87,8 +87,6 @@ steps:
       queue: "${BUILDKITE_AGENT_META_DATA_QUEUE:-default}"
       distro: "${BUILDKITE_AGENT_META_DATA_DISTRO}"
       hostname: "${BUILDKITE_AGENT_META_DATA_HOSTNAME}"
-    soft_fail:
-      - exit_status: "*"
 
   - label: ':hammer: root tests'
     commands:
@@ -101,8 +99,6 @@ steps:
       queue: "${BUILDKITE_AGENT_META_DATA_QUEUE:-default}"
       distro: "${BUILDKITE_AGENT_META_DATA_DISTRO}"
       hostname: "${BUILDKITE_AGENT_META_DATA_HOSTNAME}"
-    soft_fail:
-      - exit_status: "*"
 
   - label: ':hammer: test against firecracker master'
     env: